Update PowerFx to 1.1

[NavneetThekkumpat]

PowerFx version update.
Please note that currently PowerApps does not support decimal fully but floating-point numbers which was handled here #278.
Whereas, PowerFx by default considers numbers as decimal. Hence in the tests we had to convert number to right type since we do not handle case for decimal types yet in testengine.

Validation

Tested the new version with PAC CLI. Looks good and runs well.

Checklist

• The code change is covered by unit tests. I have added tests that prove my fix is effective or that my feature works
• I have performed end-to-end test locally.
• New and existing unit tests pass locally with my changes
• I have commented my code, particularly in hard-to-understand areas
• My changes generate no new warnings
• I used clear names for everything
• I have performed a self-review of my own code

[github-actions]

Package	Line Rate	Branch Rate	Complexity	Health
Microsoft.PowerApps.TestEngine	91%	87%	982	✔
Summary	91% (2535 / 2792)	87% (597 / 684)	982	✔

Minimum allowed line rate is 85%